Granted Patent
Utility
US 4,988,766 · App. 07/246,603
Polymers prepared by polymerizing alpha, beta-ethylenically unsaturated acids and epoxy compounds and crosslinked products therefrom
Inventors:
Suryya K. Das, Samuel Porter, Jr., Wayne H. Tyger
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Sep 20, 1988
Inventors
Suryya K. Das
Samuel Porter, Jr.
Wayne H. Tyger
Assignee (at issue)
PPG Industries, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.